| 1 | /* |
| 2 | * Written by Paul Popelka (paulp@uts.amdahl.com) |
| 3 | * |
| 4 | * You can do anything you want with this software, |
| 5 | * just don't say you wrote it, |
| 6 | * and don't remove this notice. |
| 7 | * |
| 8 | * This software is provided "as is". |
| 9 | * |
| 10 | * The author supplies this software to be publicly |
| 11 | * redistributed on the understanding that the author |
| 12 | * is not responsible for the correct functioning of |
| 13 | * this software in any circumstances and is not liable |
| 14 | * for any damages caused by this software. |
| 15 | * |
| 16 | * October 1992 |
| 17 | * |
| 18 | * $Id$ |
| 19 | */ |
| 20 | |
| 21 | #include "param.h" |
| 22 | #include "systm.h" |
| 23 | #include "namei.h" |
| 24 | #include "proc.h" |
| 25 | #include "kernel.h" |
| 26 | #include "vnode.h" |
| 27 | #include "specdev.h" /* defines v_rdev */ |
| 28 | #include "mount.h" |
| 29 | #include "buf.h" |
| 30 | #include "file.h" |
| 31 | #include "malloc.h" |
| 32 | |
| 33 | #include "bpb.h" |
| 34 | #include "bootsect.h" |
| 35 | #include "direntry.h" |
| 36 | #include "denode.h" |
| 37 | #include "pcfsmount.h" |
| 38 | #include "fat.h" |
| 39 | |
| 40 | int pcfsdoforce = 0; /* 1 = force unmount */ |
| 41 | |
| 42 | /* |
| 43 | * mp - |
| 44 | * path - addr in user space of mount point (ie /usr or whatever) |
| 45 | * data - addr in user space of mount params including the |
| 46 | * name of the block special file to treat as a filesystem. |
| 47 | * ndp - |
| 48 | * p - |
| 49 | */ |
| 50 | int |
| 51 | pcfs_mount(mp, path, data, ndp, p) |
| 52 | struct mount *mp; |
| 53 | char *path; |
| 54 | caddr_t data; |
| 55 | struct nameidata *ndp; |
| 56 | struct proc *p; |
| 57 | { |
| 58 | struct vnode *devvp; /* vnode for blk device to mount */ |
| 59 | struct pcfs_args args; /* will hold data from mount request */ |
| 60 | struct pcfsmount *pmp; /* pcfs specific mount control block */ |
| 61 | int error; |
| 62 | u_int size; |
| 63 | |
| 64 | /* |
| 65 | * Copy in the args for the mount request. |
| 66 | */ |
| 67 | if (error = copyin(data, (caddr_t)&args, sizeof(struct pcfs_args))) |
| 68 | return error; |
| 69 | |
| 70 | /* |
| 71 | * Check to see if they want it to be an exportable |
| 72 | * filesystem via nfs. And, if they do, should it |
| 73 | * be read only, and what uid is root to be mapped |
| 74 | * to. |
| 75 | */ |
| 76 | if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) { |
| 77 | if (args.exflags & MNT_EXPORTED) |
| 78 | mp->mnt_flag |= MNT_EXPORTED; |
| 79 | else |
| 80 | mp->mnt_flag &= ~MNT_EXPORTED; |
| 81 | if (args.exflags & MNT_EXRDONLY) |
| 82 | mp->mnt_flag |= MNT_EXRDONLY; |
| 83 | else |
| 84 | mp->mnt_flag &= ~MNT_EXRDONLY; |
| 85 | mp->mnt_exroot = args.exroot; |
| 86 | } |
| 87 | |
| 88 | /* |
| 89 | * If they just want to update then be sure we can |
| 90 | * do what is asked. Can't change a filesystem from |
| 91 | * read/write to read only. Why? |
| 92 | * And if they've supplied a new device file name then we |
| 93 | * continue, otherwise return. |
| 94 | */ |
| 95 | if (mp->mnt_flag & MNT_UPDATE) { |
| 96 | pmp = (struct pcfsmount *)mp->mnt_data; |
| 97 | if (pmp->pm_ronly && (mp->mnt_flag & MNT_RDONLY) == 0) |
| 98 | pmp->pm_ronly = 0; |
| 99 | if (args.fspec == 0) |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | /* |
| 104 | * Now, lookup the name of the block device this |
| 105 | * mount or name update request is to apply to. |
| 106 | */ |
| 107 | ndp->ni_nameiop = LOOKUP | FOLLOW; |
| 108 | ndp->ni_segflg = UIO_USERSPACE; |
| 109 | ndp->ni_dirp = args.fspec; |
| 110 | if (error = namei(ndp, p)) |
| 111 | return error; |
| 112 | |
| 113 | /* |
| 114 | * Be sure they've given us a block device to treat |
| 115 | * as a filesystem. And, that its major number is |
| 116 | * within the bdevsw table. |
| 117 | */ |
| 118 | devvp = ndp->ni_vp; |
| 119 | if (devvp->v_type != VBLK) { |
| 120 | vrele(devvp); /* namei() acquires this? */ |
| 121 | return ENOTBLK; |
| 122 | } |
| 123 | if (major(devvp->v_rdev) >= nblkdev) { |
| 124 | vrele(devvp); |
| 125 | return ENXIO; |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * If this is an update, then make sure the vnode |
| 130 | * for the block special device is the same as the |
| 131 | * one our filesystem is in. |
| 132 | */ |
| 133 | if (mp->mnt_flag & MNT_UPDATE) { |
| 134 | if (devvp != pmp->pm_devvp) |
| 135 | error = EINVAL; |
| 136 | else |
| 137 | vrele(devvp); |
| 138 | } else { |
| 139 | |
| 140 | /* |
| 141 | * Well, it's not an update, it's a real mount request. |
| 142 | * Time to get dirty. |
| 143 | */ |
| 144 | error = mountpcfs(devvp, mp, p); |
| 145 | } |
| 146 | if (error) { |
| 147 | vrele(devvp); |
| 148 | return error; |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | * Copy in the name of the directory the filesystem |
| 153 | * is to be mounted on. |
| 154 | * Then copy in the name of the block special file |
| 155 | * representing the filesystem being mounted. |
| 156 | * And we clear the remainder of the character strings |
| 157 | * to be tidy. |
| 158 | * Then, we try to fill in the filesystem stats structure |
| 159 | * as best we can with whatever applies from a dos file |
| 160 | * system. |
| 161 | */ |
| 162 | pmp = (struct pcfsmount *)mp->mnt_data; |
| 163 | copyinstr(path, (caddr_t)mp->mnt_stat.f_mntonname, |
| 164 | sizeof(mp->mnt_stat.f_mntonname)-1, &size); |
| 165 | bzero(mp->mnt_stat.f_mntonname + size, |
| 166 | sizeof(mp->mnt_stat.f_mntonname) - size); |
| 167 | copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN-1, &size); |
| 168 | bzero(mp->mnt_stat.f_mntfromname + size, |
| 169 | MNAMELEN - size); |
| 170 | (void)pcfs_statfs(mp, &mp->mnt_stat, p); |
| 171 | #if defined(PCFSDEBUG) |
| 172 | printf("pcfs_mount(): mp %x, pmp %x, inusemap %x\n", mp, pmp, pmp->pm_inusemap); |
| 173 | #endif /* defined(PCFSDEBUG) */ |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | int |
| 178 | mountpcfs(devvp, mp, p) |
| 179 | struct vnode *devvp; |
| 180 | struct mount *mp; |
| 181 | struct proc *p; |
| 182 | { |
| 183 | int i; |
| 184 | int bpc; |
| 185 | int bit; |
| 186 | int error = 0; |
| 187 | int needclose; |
| 188 | int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; |
| 189 | dev_t dev = devvp->v_rdev; |
| 190 | union bootsector *bsp; |
| 191 | struct pcfsmount *pmp = NULL; |
| 192 | struct buf *bp0 = NULL; |
| 193 | struct byte_bpb33 *b33; |
| 194 | struct byte_bpb50 *b50; |
| 195 | |
| 196 | /* |
| 197 | * Multiple mounts of the same block special file |
| 198 | * aren't allowed. Make sure no one else has the |
| 199 | * special file open. And flush any old buffers |
| 200 | * from this filesystem. Presumably this prevents |
| 201 | * us from running into buffers that are the wrong |
| 202 | * blocksize. |
| 203 | * NOTE: mountedon() is a part of the ufs filesystem. |
| 204 | * If the ufs filesystem is not gen'ed into the system |
| 205 | * we will get an unresolved reference. |
| 206 | */ |
| 207 | if (error = mountedon(devvp)) { |
| 208 | return error; |
| 209 | } |
| 210 | if (vcount(devvp) > 1) |
| 211 | return EBUSY; |
| 212 | vinvalbuf(devvp, 1); |
| 213 | |
| 214 | /* |
| 215 | * Now open the block special file. |
| 216 | */ |
| 217 | if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p)) |
| 218 | return error; |
| 219 | needclose = 1; |
| 220 | #if defined(HDSUPPORT) |
| 221 | /* |
| 222 | * Put this in when we support reading dos filesystems |
| 223 | * from partitioned harddisks. |
| 224 | */ |
| 225 | if (VOP_IOCTL(devvp, DIOCGPART, &pcfspart, FREAD, NOCRED, p) == 0) { |
| 226 | } |
| 227 | #endif /* defined(HDSUPPORT) */ |
| 228 | |
| 229 | /* |
| 230 | * Read the boot sector of the filesystem, and then |
| 231 | * check the boot signature. If not a dos boot sector |
| 232 | * then error out. We could also add some checking on |
| 233 | * the bsOemName field. So far I've seen the following |
| 234 | * values: |
| 235 | * "IBM 3.3" |
| 236 | * "MSDOS3.3" |
| 237 | * "MSDOS5.0" |
| 238 | */ |
| 239 | if (error = bread(devvp, 0, 512, NOCRED, &bp0)) |
| 240 | goto error_exit; |
| 241 | bp0->b_flags |= B_AGE; |
| 242 | bsp = (union bootsector *)bp0->b_un.b_addr; |
| 243 | b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB; |
| 244 | b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB; |
| 245 | if (bsp->bs50.bsBootSectSig != BOOTSIG) { |
| 246 | error = EINVAL; |
| 247 | goto error_exit; |
| 248 | } |
| 249 | |
| 250 | pmp = malloc(sizeof *pmp, M_PCFSMNT, M_WAITOK); |
| 251 | pmp->pm_inusemap = NULL; |
| 252 | pmp->pm_mountp = mp; |
| 253 | |
| 254 | /* |
| 255 | * Compute several useful quantities from the bpb in |
| 256 | * the bootsector. Copy in the dos 5 variant of the |
| 257 | * bpb then fix up the fields that are different between |
| 258 | * dos 5 and dos 3.3. |
| 259 | */ |
| 260 | pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec); |
| 261 | pmp->pm_SectPerClust = b50->bpbSecPerClust; |
| 262 | pmp->pm_ResSectors = getushort(b50->bpbResSectors); |
| 263 | pmp->pm_FATs = b50->bpbFATs; |
| 264 | pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts); |
| 265 | pmp->pm_Sectors = getushort(b50->bpbSectors); |
| 266 | pmp->pm_Media = b50->bpbMedia; |
| 267 | pmp->pm_FATsecs = getushort(b50->bpbFATsecs); |
| 268 | pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack); |
| 269 | pmp->pm_Heads = getushort(b50->bpbHeads); |
| 270 | if (pmp->pm_Sectors == 0) { |
| 271 | pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs); |
| 272 | pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors); |
| 273 | } else { |
| 274 | pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs); |
| 275 | pmp->pm_HugeSectors = pmp->pm_Sectors; |
| 276 | } |
| 277 | pmp->pm_fatblk = pmp->pm_ResSectors; |
| 278 | pmp->pm_rootdirblk = pmp->pm_fatblk + |
| 279 | (pmp->pm_FATs * pmp->pm_FATsecs); |
| 280 | pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry)) |
| 281 | / |
| 282 | pmp->pm_BytesPerSec; /* in sectors */ |
| 283 | pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize; |
| 284 | pmp->pm_nmbrofclusters = (pmp->pm_HugeSectors - pmp->pm_firstcluster) / |
| 285 | pmp->pm_SectPerClust; |
| 286 | pmp->pm_maxcluster = pmp->pm_nmbrofclusters + 1; |
| 287 | pmp->pm_fatsize = pmp->pm_FATsecs * pmp->pm_BytesPerSec; |
| 288 | if (FAT12(pmp)) |
| 289 | /* This will usually be a floppy disk. |
| 290 | * This size makes sure that one fat entry will not be split |
| 291 | * across multiple blocks. */ |
| 292 | pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec; |
| 293 | else |
| 294 | /* This will usually be a hard disk. |
| 295 | * Reading or writing one block should be quite fast. */ |
| 296 | pmp->pm_fatblocksize = MAXBSIZE; |
| 297 | pmp->pm_fatblocksec = pmp->pm_fatblocksize / pmp->pm_BytesPerSec; |
| 298 | |
| 299 | if ((pmp->pm_rootdirsize % pmp->pm_SectPerClust) != 0) |
| 300 | printf("mountpcfs(): root directory is not a multiple of the clustersize in length\n"); |
| 301 | |
| 302 | /* |
| 303 | * Compute mask and shift value for isolating cluster relative |
| 304 | * byte offsets and cluster numbers from a file offset. |
| 305 | */ |
| 306 | bpc = pmp->pm_SectPerClust * pmp->pm_BytesPerSec; |
| 307 | pmp->pm_bpcluster = bpc; |
| 308 | pmp->pm_depclust = bpc/sizeof(struct direntry); |
| 309 | pmp->pm_crbomask = bpc - 1; |
| 310 | if (bpc == 0) { |
| 311 | error = EINVAL; |
| 312 | goto error_exit; |
| 313 | } |
| 314 | bit = 1; |
| 315 | for (i = 0; i < 32; i++) { |
| 316 | if (bit & bpc) { |
| 317 | if (bit ^ bpc) { |
| 318 | error = EINVAL; |
| 319 | goto error_exit; |
| 320 | } |
| 321 | pmp->pm_cnshift = i; |
| 322 | break; |
| 323 | } |
| 324 | bit <<= 1; |
| 325 | } |
| 326 | |
| 327 | pmp->pm_brbomask = 0x01ff; /* 512 byte blocks only (so far) */ |
| 328 | pmp->pm_bnshift = 9; /* shift right 9 bits to get bn */ |
| 329 | |
| 330 | /* |
| 331 | * Release the bootsector buffer. |
| 332 | */ |
| 333 | brelse(bp0); |
| 334 | bp0 = NULL; |
| 335 | |
| 336 | /* |
| 337 | * Allocate memory for the bitmap of allocated clusters, |
| 338 | * and then fill it in. |
| 339 | */ |
| 340 | pmp->pm_inusemap = malloc((pmp->pm_maxcluster >> 3) + 1, |
| 341 | M_PCFSFAT, M_WAITOK); |
| 342 | |
| 343 | /* |
| 344 | * fillinusemap() needs pm_devvp. |
| 345 | */ |
| 346 | pmp->pm_dev = dev; |
| 347 | pmp->pm_devvp = devvp; |
| 348 | |
| 349 | /* |
| 350 | * Have the inuse map filled in. |
| 351 | */ |
| 352 | error = fillinusemap(pmp); |
| 353 | if (error) |
| 354 | goto error_exit; |
| 355 | |
| 356 | /* |
| 357 | * If they want fat updates to be synchronous then let |
| 358 | * them suffer the performance degradation in exchange |
| 359 | * for the on disk copy of the fat being correct just |
| 360 | * about all the time. I suppose this would be a good |
| 361 | * thing to turn on if the kernel is still flakey. |
| 362 | */ |
| 363 | pmp->pm_waitonfat = mp->mnt_flag & MNT_SYNCHRONOUS; |
| 364 | |
| 365 | /* |
| 366 | * Finish up. |
| 367 | */ |
| 368 | pmp->pm_ronly = ronly; |
| 369 | if (ronly == 0) |
| 370 | pmp->pm_fmod = 1; |
| 371 | mp->mnt_data = (qaddr_t)pmp; |
| 372 | mp->mnt_stat.f_fsid.val[0] = (long)dev; |
| 373 | mp->mnt_stat.f_fsid.val[1] = MOUNT_MSDOS; |
| 374 | mp->mnt_flag |= MNT_LOCAL; |
| 375 | #if defined(QUOTA) |
| 376 | /* |
| 377 | * If we ever do quotas for DOS filesystems this would |
| 378 | * be a place to fill in the info in the pcfsmount |
| 379 | * structure. |
| 380 | * You dolt, quotas on dos filesystems make no sense |
| 381 | * because files have no owners on dos filesystems. |
| 382 | * of course there is some empty space in the directory |
| 383 | * entry where we could put uid's and gid's. |
| 384 | */ |
| 385 | #endif /* defined(QUOTA) */ |
| 386 | devvp->v_specflags |= SI_MOUNTEDON; |
| 387 | |
| 388 | return 0; |
| 389 | |
| 390 | error_exit:; |
| 391 | if (bp0) |
| 392 | brelse(bp0); |
| 393 | if (needclose) |
| 394 | (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, |
| 395 | NOCRED, p); |
| 396 | if (pmp) { |
| 397 | if (pmp->pm_inusemap) |
| 398 | free((caddr_t)pmp->pm_inusemap, M_PCFSFAT); |
| 399 | free((caddr_t)pmp, M_PCFSMNT); |
| 400 | mp->mnt_data = (qaddr_t)0; |
| 401 | } |
| 402 | return error; |
| 403 | } |
| 404 | |
| 405 | int |
| 406 | pcfs_start(mp, flags, p) |
| 407 | struct mount *mp; |
| 408 | int flags; |
| 409 | struct proc *p; |
| 410 | { |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * Unmount the filesystem described by mp. |
| 416 | */ |
| 417 | int |
| 418 | pcfs_unmount(mp, mntflags, p) |
| 419 | struct mount *mp; |
| 420 | int mntflags; |
| 421 | struct proc *p; |
| 422 | { |
| 423 | int flags = 0; |
| 424 | int error; |
| 425 | struct pcfsmount *pmp = (struct pcfsmount *)mp->mnt_data; |
| 426 | struct vnode *vp = pmp->pm_devvp; |
| 427 | |
| 428 | if (mntflags & MNT_FORCE) { |
| 429 | if (!pcfsdoforce) |
| 430 | return EINVAL; |
| 431 | flags |= FORCECLOSE; |
| 432 | } |
| 433 | mntflushbuf(mp, 0); |
| 434 | if (mntinvalbuf(mp)) |
| 435 | return EBUSY; |
| 436 | #if defined(QUOTA) |
| 437 | #endif /* defined(QUOTA) */ |
| 438 | if (error = vflush(mp, NULLVP, flags)) |
| 439 | return error; |
| 440 | pmp->pm_devvp->v_specflags &= ~SI_MOUNTEDON; |
| 441 | #if defined(PCFSDEBUG) |
| 442 | printf("pcfs_umount(): just before calling VOP_CLOSE()\n"); |
| 443 | printf("flag %08x, usecount %d, writecount %d, holdcnt %d\n", |
| 444 | vp->v_flag, vp->v_usecount, vp->v_writecount, vp->v_holdcnt); |
| 445 | printf("lastr %d, id %d, mount %08x, op %08x\n", |
| 446 | vp->v_lastr, vp->v_id, vp->v_mount, vp->v_op); |
| 447 | printf("freef %08x, freeb %08x, mountf %08x, mountb %08x\n", |
| 448 | vp->v_freef, vp->v_freeb, vp->v_mountf, vp->v_mountb); |
| 449 | printf("cleanblkhd %08x, dirtyblkhd %08x, numoutput %d, type %d\n", |
| 450 | vp->v_cleanblkhd, vp->v_dirtyblkhd, vp->v_numoutput, vp->v_type); |
| 451 | printf("union %08x, tag %d, data[0] %08x, data[1] %08x\n", |
| 452 | vp->v_socket, vp->v_tag, vp->v_data[0], vp->v_data[1]); |
| 453 | #endif /* defined(PCFSDEBUG) */ |
| 454 | error = VOP_CLOSE(pmp->pm_devvp, pmp->pm_ronly ? FREAD : FREAD|FWRITE, |
| 455 | NOCRED, p); |
| 456 | vrele(pmp->pm_devvp); |
| 457 | free((caddr_t)pmp->pm_inusemap, M_PCFSFAT); |
| 458 | free((caddr_t)pmp, M_PCFSMNT); |
| 459 | mp->mnt_data = (qaddr_t)0; |
| 460 | mp->mnt_flag &= ~MNT_LOCAL; |
| 461 | return error; |
| 462 | } |
| 463 | |
| 464 | int |
| 465 | pcfs_root(mp, vpp) |
| 466 | struct mount *mp; |
| 467 | struct vnode **vpp; |
| 468 | { |
| 469 | struct denode *ndep; |
| 470 | struct pcfsmount *pmp = (struct pcfsmount *)(mp->mnt_data); |
| 471 | int error; |
| 472 | |
| 473 | error = deget(pmp, PCFSROOT, PCFSROOT_OFS, NULL, &ndep); |
| 474 | #if defined(PCFSDEBUG) |
| 475 | printf("pcfs_root(); mp %08x, pmp %08x, ndep %08x, vp %08x\n", |
| 476 | mp, pmp, ndep, DETOV(ndep)); |
| 477 | #endif /* defined(PCFSDEBUG) */ |
| 478 | if (error == 0) |
| 479 | *vpp = DETOV(ndep); |
| 480 | return error; |
| 481 | } |
| 482 | |
| 483 | int |
| 484 | pcfs_quotactl(mp, cmds, uid, arg, p) |
| 485 | struct mount *mp; |
| 486 | int cmds; |
| 487 | uid_t uid; |
| 488 | caddr_t arg; |
| 489 | struct proc *p; |
| 490 | { |
| 491 | #if defined(QUOTA) |
| 492 | #else |
| 493 | return EOPNOTSUPP; |
| 494 | #endif /* defined(QUOTA) */ |
| 495 | } |
| 496 | |
| 497 | int |
| 498 | pcfs_statfs(mp, sbp, p) |
| 499 | struct mount *mp; |
| 500 | struct statfs *sbp; |
| 501 | struct proc *p; |
| 502 | { |
| 503 | struct pcfsmount *pmp = (struct pcfsmount *)mp->mnt_data; |
| 504 | |
| 505 | /* |
| 506 | * Fill in the stat block. |
| 507 | */ |
| 508 | sbp->f_type = MOUNT_MSDOS; |
| 509 | sbp->f_fsize = pmp->pm_bpcluster; |
| 510 | sbp->f_bsize = pmp->pm_bpcluster; |
| 511 | sbp->f_blocks = pmp->pm_nmbrofclusters; |
| 512 | sbp->f_bfree = pmp->pm_freeclustercount; |
| 513 | sbp->f_bavail = pmp->pm_freeclustercount; |
| 514 | sbp->f_files = pmp->pm_RootDirEnts; |
| 515 | sbp->f_ffree = 0; /* what to put in here? */ |
| 516 | |
| 517 | /* |
| 518 | * Copy the mounted on and mounted from names into |
| 519 | * the passed in stat block, if it is not the one |
| 520 | * in the mount structure. |
| 521 | */ |
| 522 | if (sbp != &mp->mnt_stat) { |
| 523 | bcopy((caddr_t)mp->mnt_stat.f_mntonname, |
| 524 | (caddr_t)&sbp->f_mntonname[0], MNAMELEN); |
| 525 | bcopy((caddr_t)mp->mnt_stat.f_mntfromname, |
| 526 | (caddr_t)&sbp->f_mntfromname[0], MNAMELEN); |
| 527 | } |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | int |
| 532 | pcfs_sync(mp, waitfor) |
| 533 | struct mount *mp; |
| 534 | int waitfor; |
| 535 | { |
| 536 | struct vnode *vp; |
| 537 | struct denode *dep; |
| 538 | struct pcfsmount *pmp; |
| 539 | int error; |
| 540 | int allerror = 0; |
| 541 | |
| 542 | pmp = (struct pcfsmount *)mp->mnt_data; |
| 543 | |
| 544 | /* |
| 545 | * If we ever switch to not updating all of the fats |
| 546 | * all the time, this would be the place to update them |
| 547 | * from the first one. |
| 548 | */ |
| 549 | if (pmp->pm_fmod) { |
| 550 | if (pmp->pm_ronly) { |
| 551 | printf("pcfs_sync(): writing to readonly filesystem\n"); |
| 552 | return EINVAL; |
| 553 | } else { |
| 554 | /* update fats here */ |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * Go thru in memory denodes and write them out along |
| 560 | * with unwritten file blocks. |
| 561 | */ |
| 562 | loop: |
| 563 | for (vp = mp->mnt_mounth; vp; vp = vp->v_mountf) { |
| 564 | if (vp->v_mount != mp) /* not ours anymore */ |
| 565 | goto loop; |
| 566 | if (VOP_ISLOCKED(vp)) /* file is busy */ |
| 567 | continue; |
| 568 | dep = VTODE(vp); |
| 569 | if ((dep->de_flag & DEUPD) == 0 && vp->v_dirtyblkhd == NULL) |
| 570 | continue; |
| 571 | if (vget(vp)) /* not there anymore? */ |
| 572 | goto loop; |
| 573 | if (vp->v_dirtyblkhd) /* flush dirty file blocks */ |
| 574 | vflushbuf(vp, 0); |
| 575 | if ((dep->de_flag & DEUPD) && |
| 576 | (error = deupdat(dep, &time, 0))) |
| 577 | allerror = error; |
| 578 | vput(vp); /* done with this one */ |
| 579 | } |
| 580 | |
| 581 | /* |
| 582 | * Flush filesystem control info. |
| 583 | */ |
| 584 | vflushbuf(pmp->pm_devvp, waitfor == MNT_WAIT ? B_SYNC : 0); |
| 585 | return allerror; |
| 586 | } |
| 587 | |
| 588 | int |
| 589 | pcfs_fhtovp (mp, fhp, vpp) |
| 590 | struct mount *mp; |
| 591 | struct fid *fhp; |
| 592 | struct vnode **vpp; |
| 593 | { |
| 594 | struct pcfsmount *pmp = (struct pcfsmount *)mp->mnt_data; |
| 595 | struct defid *defhp = (struct defid *)fhp; |
| 596 | struct denode *dep; |
| 597 | int error; |
| 598 | |
| 599 | error = deget (pmp, defhp->defid_dirclust, defhp->defid_dirofs, |
| 600 | NULL, &dep); |
| 601 | if (error) |
| 602 | return (error); |
| 603 | *vpp = DETOV (dep); |
| 604 | return (0); |
| 605 | } |
| 606 | |
| 607 | |
| 608 | int |
| 609 | pcfs_vptofh (vp, fhp) |
| 610 | struct vnode *vp; |
| 611 | struct fid *fhp; |
| 612 | { |
| 613 | struct denode *dep = VTODE(vp); |
| 614 | struct defid *defhp = (struct defid *)fhp; |
| 615 | |
| 616 | defhp->defid_len = sizeof(struct defid); |
| 617 | defhp->defid_dirclust = dep->de_dirclust; |
| 618 | defhp->defid_dirofs = dep->de_diroffset; |
| 619 | /* defhp->defid_gen = ip->i_gen; */ |
| 620 | return (0); |
| 621 | } |
| 622 | |
| 623 | struct vfsops pcfs_vfsops = { |
| 624 | pcfs_mount, |
| 625 | pcfs_start, |
| 626 | pcfs_unmount, |
| 627 | pcfs_root, |
| 628 | pcfs_quotactl, |
| 629 | pcfs_statfs, |
| 630 | pcfs_sync, |
| 631 | pcfs_fhtovp, |
| 632 | pcfs_vptofh, |
| 633 | pcfs_init |
| 634 | }; |